Heat insulating case



July 7, 1931. M, WEBSTER I 1,813,787

HEAT INSULATING CASE Filed Sept. 50, 1929 INVENTOR J (aZvan Z7. webseri' Patented July 7, 1931 urrsn s'rres MELVIN L. WEBSTER, OF INDEPENDTNCE, IOWA.

HEAT INSULATING oasis Application filed September 30,1929. Serial Iva-396,198.

My invention relates to improvements in heat insulated cases, and the object of my improvement is to supply for shippers and others, combination heat insulated cases for receiving goods in a relatively heated or cooled condition, the construction of the same being such as to provide dead air heat insulating spaces within the outer case and surrounding the entire inner case, the device having means for spacing said cases apart,

and the construction being inexpensive, simple, effective for said purpose, and suitable for use in storage or shipping.

I have accomplished the above object by the means which are hereinafter described and claimed, and which are illustrated in the annexed drawings, in which Fig. 1 is a vertical cross section of my heat insulated case, I

with its elements assembled. Fig. 2 is a top plan of the inner case only. Fig. 3 is a vertical cross section of a modification of the device, and Fig. 4 is a top plan of the assembled outer and inner cases, with the closures for both removed.

It is to be understood that various other modifications in the details of the device may be made without departing from this invention.

Fig. 1 shows an open end outer case made of fiber or other suitable material, and hav ing the superposed pairs of flap closure members 2 and 3 for its top open end, the bottom being closed. The upper pair of flaps 3 may be secured by means of gummed strips overlaid upon their joint of meeting medially or by other means.

An inner case 4 is positioned removably within and centrally in the outer case 1 and spaced throughout from the inner walls and closures of the latter, but has along its upper and lower peripheral horizontal angles flexible self flaps 5 projecting outwardly at angles oblique to the cases to engage the like inner horizontal reentrant angles of the outer case 1 when the case 4 is mounted in said outer case. The inner case 4 is thus supported centrally in the outer case, the flexible flaps affording some shock-absorbing protection to the inner case and its contents.

The inner case has also two overlaid pairs of self fiapclosure members 6 and 7, similar to the-closure members of said outer case, and these may be sealed closed if desired. The

flaps 5 may be unitedby means of clinched staples 8, or' other means.

It will be seen, that as thus assembled, the

contents oi"- the inner case 4. whether cooled "as ice" cream bricks or meat products, or

heated, as cooked food orother products, are thoroughly heat insulated by means of the substantially continuous dead air spaces therearound. The flaps 5 are flexibly hinged to theinner case and may give flexibly slightly when the outer case 1 is jarred, which preserves the inner case from injury.

Figs. 3 and 4 show. a modification of my device. The outer casejpart 1 has an open end, telescoping coverll. The inner case 4 has at the bottom flaps 5 like those shownin Fig. 1. The upper part of the outer case 1 'isdiminished-at 9 slopingly upwardly I and then terminates inivertically disposed top flaps 1'0, unconnected'like the parts 9 at their meeting vertical edges, so as to allow them some springing outwardly. "Said inner case has straight vertical walls and may because of the slight springing apart of the outer case parts 9 and 10 be fitted within the neck of the latter closely.

The numeral 12 denotes a top closure for said thus approximated cases, having sloping top flaps 14 similar to the flaps 5, and having a depending hollow part .15 which fits upon the approximated inner case and outer case neck parts to bind them together closely. The cover 12 may have a depending central block 13 thereon spaced from its side walls, to seat in their interspace the upper edge parts of the part 10. When assembled, the inner case is thus insulated from the outer case substantially as completely as in the device of Fig. 1.

e As these devices may be quickly and easily constructed of fiber board, they are cheap, and suitable for shipping or storing uses, to keep the contents from changes of temperature for the usually comparatively not lengthy periods of such uses.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. A heat insulated receptacle, comprising in combination, an outer case having an open upper end and a closure therefor, and an inner case having an open end and a closure therefor, the inner case having wall projections releasably engaging the inner walls of the outer case to provide an uninterrupted dead air space all around the side parts of the inner case, and separated dead air spaces at 10 the end parts of the case.

2. A heat insulated receptacle, comprising in combination, an outer case having an upper open end and a closure therefor, and'an inner case having flexibly connected outer 15 spacing projections engaging slopingly the upper and lower reentrant end angles only of the outer case to provide a substantially uninterrupted dead air space all around the side parts of the inner case.

29 3. A heat insulated receptacle, comprising in combination, an outer case having an open end and a closure therefor, and an inner case having an open end and a closure therefor, and spaced all around from the outer case,

. and spacing devices between the adjacent end angles of said cases for maintaining a substantially uninterrupted dead air space all 7 around the side parts of the inner case.

4. A heat insulated receptacle, comprising 30 in combination, an outer case having an open end, a closure for said open end, said case having an upwardly diminished neck with parts separated by slits upwardly, an inner open end case whose open upper part is closely fitted into said slitted neck and whose lower end has spacer flaps engaging the outer case, and a closure for said inner case having top flaps for engaging the inner top wall of the first mentioned closure. m In testimony whereof I affix mycsignature.

MELVIN L. WEBSTER. 

